Surcharges are calculated for each Carpenter alloy based upon a complicated formula utilizing the chemical composition of the alloy, the effective non-coverable yield from melt, and the delta between the 1999 base values and the current market values. Surcharges are applicable at time of shipment unless otherwise stated at order entry.

Current market values are obtained from various industry publications as stated on the historical elemental graphs. The RMS calculation is based upon the previous monthly average of these elemental prices. In the event that raw material prices fluctuate more than +/- 10% from the previous month, Carpenter reserves the right to modify the current monthly surcharge.